Hifi Professional Audio-Monitoring Headphones - Closed-back, circum-aural headphones for professional sound monitoring in recording, TV & broadcast studios or live sound and DJs applications # 50 mm driver and high sensitivity neodymium magnet - Circum-aural ear-pads for excellent isolation - Convenient auto-swivel ear-cups for single-sided monitoring - Adjustable, padded headband - High quality cable # Impedance: 60 Ohms (@1Khz) - Sensitivity(SPL): 102dB/mW (@ max.power) - Power Handling: 200mW (max.rated) - Frequency response: 20Hz to 20KHz - Cord: 1.2 to 4.0 m/ 4 to 15 ft. coiled cable w/ 3.5 mm (.125 in.) ¿ gold plated stereo mini-plug - Weight: 385 g/13.6 oz (w/cord). - ROHS Compliant.